Guinness Chocolate Brownies Recipe
Introduction
These Guinness Chocolate Brownies combine rich chocolate with the deep, malty flavor of Guinness stout for a decadent treat. They’re moist, fudgy, and topped with a luscious chocolate ganache that’s sure to impress. Perfect for sharing at any gathering or enjoying with a cup of coffee.

Ingredients
- 1/2 cup vegetable oil
- 1 1/3 cup Guinness Stout beer
- 2 1/2 cups white sugar
- 1/2 teaspoon vanilla extract
- 1/2 cup salted butter, melted and cooled
- 4 eggs
- 2 cups flour
- 1 cup unsweetened cocoa powder
- 10 oz semi-sweet chocolate chips
- 4 tbsp salted butter
- 4 tbsp Guinness Stout beer
- 1/2 cup powdered sugar
Instructions
- Step 1: Preheat your oven to 350 degrees F. Grease a 9×9 square baking pan and line it with parchment paper, leaving handles on two opposite sides for easy removal.
- Step 2: In a large bowl, mix together the vegetable oil, Guinness stout, white sugar, and vanilla extract until combined.
- Step 3: Add the melted and cooled butter to the mixture and stir well.
- Step 4: Add the eggs one at a time, mixing thoroughly after each addition.
- Step 5: In a separate medium bowl, whisk together the flour and unsweetened cocoa powder. Gradually add this dry mixture to the wet ingredients, stirring until fully combined.
- Step 6: Pour the batter into the prepared pan and spread evenly.
- Step 7: Bake for about 35 minutes, or until a toothpick inserted near the center comes out with just a few moist crumbs. Let the brownies cool completely in the pan.
- Step 8: For the ganache, place the chocolate chips, 4 tablespoons of butter, and 4 tablespoons of Guinness stout in a microwave-safe bowl. Microwave for 30 seconds, stir well, then continue microwaving in 30-second intervals, stirring after each, until the mixture is smooth.
- Step 9: Stir in the powdered sugar until the ganache is smooth and fully combined.
- Step 10: Pour the ganache over the cooled brownies and spread into an even layer. Chill until set.
- Step 11: Once set, cut into bars and serve.
Tips & Variations
- For an extra fudgy texture, use slightly less flour or substitute half the flour with almond flour.
- If you prefer a non-alcoholic version, substitute the Guinness with a cola or root beer for a similar depth of flavor.
- Try adding chopped nuts or a pinch of espresso powder to intensify the chocolate flavor.
Storage
Store leftover brownies in an airtight container at room temperature for up to 3 days, or refrigerate for up to a week. Reheat gently in the microwave if desired. The ganache topping may firm up when chilled but will soften at room temperature.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use a different type of beer?
Yes, but using a stout like Guinness gives the brownies a rich, deep flavor. Lighter beers may alter the taste and texture.
How do I know when the brownies are done?
Insert a toothpick into the center—if it comes out with just a few moist crumbs, the brownies are ready. Avoid overbaking to keep them fudgy.
Print
Guinness Chocolate Brownies Recipe
- Total Time: 50 minutes
- Yield: 12 servings 1x
Description
Decadent Guinness Chocolate Brownies featuring a rich blend of stout beer and semi-sweet chocolate, topped with a silky chocolate ganache infused with beer for an indulgent treat perfect for any chocolate lover.
Ingredients
Brownie Batter
- 1/2 cup vegetable oil
- 1 1/3 cups Guinness Stout beer
- 2 1/2 cups white sugar
- 1/2 teaspoon vanilla extract
- 1/2 cup salted butter, melted and cooled
- 4 eggs
- 2 cups all-purpose flour
- 1 cup unsweetened cocoa powder
Ganache
- 10 oz semi-sweet chocolate chips
- 4 tablespoons salted butter
- 4 tablespoons Guinness Stout beer
- 1/2 cup powdered sugar
Instructions
- Preheat the oven: Set your oven to 350 degrees Fahrenheit (175 degrees Celsius) to ensure it’s properly heated by the time your batter is ready.
- Prepare the pan: Grease a 9×9 inch square baking pan thoroughly, then line it with parchment paper leaving handles on two opposite sides to make removal easier later.
- Mix wet ingredients: In a large bowl, combine the vegetable oil, Guinness Stout beer, white sugar, and vanilla extract. Stir well to blend all the liquids and sugar.
- Add butter: Pour in the melted and cooled salted butter and mix until fully incorporated into the wet mixture.
- Incorporate eggs: Crack in the eggs and stir the mixture until it’s smooth and uniform in texture.
- Combine dry ingredients: In a separate medium bowl, whisk together the all-purpose flour and unsweetened cocoa powder to evenly distribute the cocoa throughout the flour.
- Mix dry into wet: Gradually add the flour and cocoa mixture into the wet ingredients, stirring gently until just combined. Avoid overmixing to keep the brownies tender.
- Pour batter into pan: Transfer the batter to your prepared baking pan, spreading it evenly with a spatula for uniform baking.
- Bake the brownies: Place the pan in the oven and bake for approximately 35 minutes. Test doneness by inserting a toothpick into the center; it should come out with a few moist crumbs but not wet batter.
- Cool the brownies: Remove the pan from the oven and allow the brownies to cool completely in the pan before adding ganache to prevent melting.
- Prepare ganache: In a microwave-safe bowl, combine the semi-sweet chocolate chips, salted butter, and Guinness Stout beer. Microwave in 30-second intervals, stirring well after each, until the mixture is smooth and fully melted.
- Add powdered sugar: Sift in the powdered sugar and whisk the ganache until smooth and completely combined for a glossy finish.
- Apply ganache: Pour the ganache evenly over the cooled brownies and spread gently with a spatula.
- Chill to set: Place the brownies in the refrigerator to chill until the ganache is firm and set.
- Serve: Once set, cut the brownies into 12 bars and serve for a rich, chocolatey treat with a hint of stout flavor.
Notes
- Ensure the butter is cooled before adding to avoid cooking the eggs prematurely.
- Using Guinness Stout beer adds a unique depth of flavor that complements the chocolate.
- Do not overbake the brownies to maintain their fudgy texture.
- The ganache must fully set before slicing to ensure clean cuts.
- You can substitute semi-sweet chocolate chips with dark chocolate chips for a richer taste.
- Prep Time: 10 minutes
- Cook Time: 35 minutes
- Category: Dessert
- Method: Baking
- Cuisine: Irish-American
Keywords: Guinness brownies, chocolate brownies, stout beer brownies, chocolate ganache, dessert, Irish chocolate dessert

